Bug 515635

Summary:	Black screen after clicking on Dolphin File Manager
Product:	[Plasma] kwin	Reporter:	dougg0k
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DOWNSTREAM
Severity:	normal	CC:	ivan.cukic, kdedev
Priority:	NOR
Version First Reported In:	6.5.5
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description dougg0k 2026-02-06 15:53:56 UTC

SUMMARY
It's a bug that happened before but I am not sure why, I clicked on the dolphin file manager and screen went black for any monitors, only fix was hard reboot through button. Very rare and random.

STEPS TO REPRODUCE
1. Click on Dolphin to open

OBSERVED RESULT
The desktop was still working, as I was able to close a browser that was playing a song with alt+f4, but that is the only thing I was able to do before the restart.

EXPECTED RESULT
Work as expected.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2

ADDITIONAL INFORMATION
Not sure these contain the cause of the issue. It was after the reboot. https://pastebin.com/45cCCpss

Comment 1 dougg0k 2026-02-06 15:54:39 UTC

❯ dolphin --version 
dolphin 25.12.2
QThreadStorage: entry 3 destroyed before end of thread 0x561189893bf0
QThreadStorage: entry 2 destroyed before end of thread 0x561189893bf0

It's in a arch linux based distro.

Comment 2 dougg0k 2026-02-06 16:11:23 UTC

I've now setup journalctl properly, if happens again, it should have the previous boot log.

Comment 3 TraceyC 2026-02-06 17:09:27 UTC

Thanks for the bug report and the detailed logs. It sounds like kwin crashed or ran into an error condition.

From what I see, there may be a system level issue. It looks like a number of services may be misconfigured. These parts of the log are what leads me to think that:

fev 06 12:44:58 desktop-pc dbus-broker-launch[3017]: Service file '/usr/share/dbus-1/services/org.kde.dolphin.FileManager1.service' is not named after the D-Bus name 'org.freedesktop.FileManager1'.
fev 06 12:44:58 desktop-pc dbus-broker-launch[3017]: Service file '/usr/share/dbus-1/services/org.kde.kscreen.service' is not named after the D-Bus name 'org.kde.KScreen'.
fev 06 12:44:58 desktop-pc dbus-broker-launch[3017]: Service file '/usr/share/dbus-1/services/org.kde.plasma.Notifications.service' is not named after the D-Bus name 'org.freedesktop.Notifications'.
fev 06 12:44:59 desktop-pc wireplumber[3040]: default: Failed to get percentage from UPower: org.freedesktop.DBus.Error.NameHasNoOwner
fev 06 12:44:59 desktop-pc wireplumber[3040]: spa.bluez5: BlueZ system service is not available
fev 06 12:45:00 desktop-pc dbus-broker-launch[2558]: Activation request for 'org.freedesktop.Avahi' failed: The systemd unit 'dbus-org.freedesktop.Avahi.service' could not be found


    fev 06 12:45:05 desktop-pc pipewire[3671]: pw.conf: 0x561d1ba3ac40: error loading config '/home/user/.config/pipewire/pipewire.conf.d/20-echo-cancel.conf': Invalid argument
    fev 06 12:45:05 desktop-pc wireplumber[3674]: wp-conf: <WpConf:0x55e158c923e0> failed to open '/home/user/.config/wireplumber/wireplumber.conf.d/54-set-default-output-profile.conf': section 'monitor.alsa.rules' has no value
    fev 06 12:45:06 desktop-pc wireplumber[3674]: default: Failed to get percentage from UPower: org.freedesktop.DBus.Error.NameHasNoOwner
    fev 06 12:45:06 desktop-pc wireplumber[3674]: spa.bluez5: BlueZ system service is not available
    fev 06 12:45:06 desktop-pc kernel: nvme nvme0: using unchecked data buffer
    fev 06 12:45:06 desktop-pc kded6[3734]: QDBusObjectPath: invalid path "/modules/oom-notifier"
    fev 06 12:45:06 desktop-pc kded6[3734]: The kded module name "oom-notifier" is invalid!
    fev 06 12:45:06 desktop-pc kded6[3734]: QDBusObjectPath: invalid path "/modules/plasma-session-shortcuts"
    fev 06 12:45:06 desktop-pc kded6[3734]: The kded module name "plasma-session-shortcuts" is invalid!
    fev 06 12:45:06 desktop-pc kded6[3734]: Failed to connect to Bolt manager DBus interface:
    fev 06 12:45:06 desktop-pc kded6[3734]: QDBusObjectPath: invalid path "/modules/wpad-detector"
    fev 06 12:45:06 desktop-pc kded6[3734]: The kded module name "wpad-detector" is invalid!
    fev 06 12:45:06 desktop-pc kconf_update[3865]: /usr/share/kconf_update/filepicker.upd defined Version=5 but Version=6 was expected
    fev 06 12:45:06 desktop-pc kded6[3734]: QDBusConnection: name 'org.freedesktop.UPower' had owner '' but we thought it was ':1.53'
    fev 06 12:45:06 desktop-pc dbus-broker-launch[2558]: Activation request for 'org.freedesktop.ModemManager1' failed: The systemd unit 'dbus-org.freedesktop.ModemManager1.service' could not be found.
    fev 06 12:45:06 desktop-pc kded6[3734]: Failed enumerating MM objects: "org.freedesktop.DBus.Error.NameHasNoOwner"
                                             "Could not activate remote peer 'org.freedesktop.ModemManager1': activation request failed: unknown unit"

You didn't mention which distro you have installed, but I recommend reaching out to their support channels to get your system in a good state first. If you continue to have problems after that, take a look at the Crashed Process Viewer and see if there are entries for kwin. If so we would need a backtrace of the crash. Thanks!

Comment 4 dougg0k 2026-02-06 17:14:22 UTC

This one is CachyOS - https://github.com/CachyOS/distribution/issues/335

Comment 5 dougg0k 2026-02-06 17:36:54 UTC

I also enabled / configured the coredump in case it helps.

Comment 6 dougg0k 2026-02-06 18:42:37 UTC

I fixed many other things and reduced the logs to https://pastebin.com/hv6wdynn

Comment 7 dougg0k 2026-02-06 19:49:11 UTC

I'm not sure if it's related to nvidia or not. But will share the only things that could make some sense in wayland.

/etc/environment

https://pastebin.com/raw/qCFW3BwA